Eraser and holder therefor



g- 1950 H. E. GRIFFIN ET AL. 2,520,085

ERASER AND HOLDER THEREFOR Filed Feb. 17, 1948 .O was. 2.

INVENTORS. W

Patented Aug. 22, 1950 ERASER AND HOLDER THEREFOR Howard Edwin Griffin, Kew Gardens, and Vincent John Collins, Richmond Hill, N. Y.; said Griffin assignor to said Collins Application February 1'7, 1948, Serial No. 8,776

1 Claim.

Our inventionrelates to rubber erasers, and more particularly to erasers used in connection with the operation of typewriters.

The object of this invention is to provide an eraser that may be easily accessible to a typist or other operator of a typewriter machine. This object is attained by having an eraser, preferably circular in shape, contained in a holder; said holder in addition to having said eraser incorporated therewith, has also a magnetic metal or alloy included in said holder; said magnetic metal or alloy having an attraction to iron or steel objects and being integral to said eraser will cause said eraser to attach itself to such an object as a typewriter frame casting or wall, said frame or wall being generally made of iron or such like ferrous metal or alloy.

A further object of this invention is to provide a holder for said eraser, said holder enabling replacement for said rubber eraser when it shall be worn down to the point that there is no usable eraser material projecting outwardly from said holder.

A further object is to furnish in combination a holder to contain a rubber or like eraser, combined with a permanent magnet, and. also incorporating therewith a brush projecting from said holder and in convenient position relative to the position of said rubber eraser; said brush to remove eraser .and paper dust after erasures have been made on typewritten copy generally incident to the process of operating a typewriter machine.

These and other objects will be seen as the description of the invention proceeds.

In the following detailed description we shall refer to the accompanying drawings in which:

Fig. 1 is an enlarged side elevation of the eraser and holder therefor, also showing the position of the permanent magnet metal or alloy;

Fig. 2 is a side cross-section view of said eraser and holder therefor on the line 22 of Fig. 1;

Fig. 3 is a detail view on the line 3-3 of Fig. 1 showing the position of the brush protruding through the holding collar arrangement of said brush; and

Fig. 4 is a stamping or stamped blank which is bent in two at the center portion thereof and when so bent, formed and secured, holds the eraser therein, and also enables said eraser to freely revolve in said holder.

Referring to the drawings, the designation I is a rubber eraser or eraser material of like properties which is held in the upper portion l6 of the eraser holder ll, said holder being bent over at the position in Fig. 4 designated as H The holder is formed of a metal sheet stamping or similar sheet material such as plastic sheeting capable of being bent over in the manner described.

The brush I2 is of the usual bristle hair type and is set into the slot opening I3 as shown in detail in Fig. 3. Said brush I 2 is held securely in position by the neckpiece or collar [4.

The permanent magnet I l is circular in conformation and cross-section thereof somewhat less than that of the cross-section of said rubber eraser, and is made preferably of such ironnickel-cobalt alloy known to the trade as Alnico, which alloy having high intensity magnetization, retaining the same for long periods of time.

Said permanent magnet M is set in position in a circular aperture in the eraser l0 between the portions I5 and [6 of the holder II, as shown in Fig. 2.

In Fig. 2 there is also known the manner in which the upper holding portions l5 and 16 of the holder Il may be spread apart to permit the placement in position of both the eraser I0 and the permanent magnet M The portions 15 and I6 are shown spread apart in broken line.

After the rubber eraser I0 and the permanent magnet 14*, which is positioned in a round opening in said eraser, have been placed in position as stated, the two portions l5 and it are permitted to spring back into normal position resting resiliently against said eraser and permanent magnet which is held thereto.

Referrin to Fig. 2, said figure showing the combination eraser, permanent magnet and brush holder in cross-section, it will be seen that the cross-section area of the permanent magnet is somewhat less-than the cross-section of the eraser ID. This difference in cross-section provides a means of securing said eraser and permanent magnet to the holder I I by reason of the circular shoulders [5 of the portions l5 and I6, which circular shoulders or beads press inwardly against the outer surface of the permanent magnet and the central area of said eraser as shown in the figure.

It will thus be seen that by the incorporation of a permanent magnet in the eraser holder as described, said holder may always be within easy reach by being attached magnetically to the casing or wall of the typewriter and in this manner would not be so apt to be mislaid or lost.

In the event of a typewriter machine having an aluminum or similar non-ferrous frame, a piece of sheet iron or like ferrous metal may be attached to the typewriter frame and thus provide a wall medium for the holder to be magnetically held thereto.

In the description of our invention we do not wish to confine ourselves to the shape of the rubber eraser whichin this case is shown to be circular. The eraser may be made in other shapes within the eraser holder; such erasers may be square, triangular or oblong in shape.

It is further obvious that other modifications are possible in our invention from that described in this specification without departing from the spirit thereof, and we therefore do not limit ourselves to the literal description herein made, being only limited to the scope of the appended claim. i

What we claim is:

In a device of the class described, a holder of bendable sheet material and :having circular portions at each end thereof, said holder bent ey tthe a proximate center thereof formin two bent over sections to provide a space in between said bent over sections, an eraser having an opening therein, a permanent magnet in said opening, said eraser mounted in the space between said bent in sections, said circular portions having a circular bead or shoulder fitting conformingly and resiliently in said opening of said eraser and against said magnet enabling the free rotation of said eraser held between said circular portions of said holder.

HOWARD EDWIN GRIFFIN. VINCENT JOHN COLLINS.

nprertnnoss CITED The fpllowing references are of record in the file of this patent:

UNITED STATES PATENTS 

